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EN 1.4347 Stainless Steel vs. EN 1.7707 Steel

Both EN 1.4347 stainless steel and EN 1.7707 steel are iron alloys. They have 69% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4347 stainless steel and the bottom bar is EN 1.7707 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
11
Fatigue Strength, MPa 320
500
Impact Strength: V-Notched Charpy, J 34
31
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 660
1010
Tensile Strength: Yield (Proof), MPa 480
800

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
460
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 16
3.3
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.9
Embodied Energy, MJ/kg 44
27
Embodied Water, L/kg 170
58

Common Calculations

PREN (Pitting Resistance) 28
3.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
110
Resilience: Unit (Modulus of Resilience), kJ/m3 570
1690
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
36
Strength to Weight: Bending, points 22
29
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 19
29

Alloy Composition

Carbon (C), % 0 to 0.050
0.26 to 0.34
Chromium (Cr), % 25 to 27
2.3 to 2.7
Iron (Fe), % 62.2 to 69.4
94.7 to 96.8
Manganese (Mn), % 0 to 1.5
0.4 to 0.7
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 5.5 to 7.5
0 to 0.6
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.5
0 to 0.4
Sulfur (S), % 0 to 0.020
0 to 0.035
Vanadium (V), % 0
0.1 to 0.2